Thanks X.
I've already got an old laptop powerbrick rated for 19V/4.74A, one benefit of working in IT 🙂, the issue I have is finding a DC socket rated for 19V operation 🙁.
My TPA3116 came direct from Yuan Jing, it arrived in less than 7 days (it was posted on the 11th and arrived on the 15th) using their cheapest airmail delivery, faster than some of my recent Amazon orders 😛.
Are you talking about the DC socket that goes on the barrel shaped jack from the laptop brick? Those are I think 5.5 mm standard jacks - unless you have a Dell or Fujitsu ps which uses funny larger dia jacks. There is nothing special about 19v and 5 amps for jacks - should be able to order it. YJ probably even sells it. I just cut the jack off and wire directly to the board's screw terminal. I don't turn my amps off ever.
Yes it's the socket for the power supply to connect to, the one I have has a standard 2.5mm centre. I would butcher the supply and wire it direct to the board but I might need it for a laptop in future 🙂.
I was just not sure of running a part rated for 12V/5A at 19V/5A, but I might just grab one of these dc-skt-dual-2-1-2-5mm-solder-dc10l and give it a bash. Plus being 2.1/2.5mm compatible means it'll enable me to use a different supply if the one I have gives up the ghost.
Cal dislikes measurements for two reasons.
1. It can make me want to dislike a speaker I previously liked because it measures poorly and vice versa.
2. It tells me my ears are different from others, so my taste in a speaker's sound is somehow flawed.
1. It can make me want to dislike a speaker I previously liked because it measures poorly and vice versa.
2. It tells me my ears are different from others, so my taste in a speaker's sound is somehow flawed.
Total guess here but my ears tell me that the bass is + a few dB at 100 - 300 Hz and would guess the F10 point to be about 50 Hz.
anyone got a drawing showing each horn path seperately, and straight ?
are they all completely alike/equal ?
or are there two different horn paths ?
are they all completely alike/equal ?
or are there two different horn paths ?
They are different length paths that start from a common throat and channel. Then there is a bifurcation on the paths and one is longer than the other. You can do this by laying a piece of string along the paths of the PDF plan. IIRC the paths are about 1.5 m and 2.2 m for the 75 cm case. The two horn lengths help to produce a smoother horn output, albeit, still lumpy by regular monitor speaker standards striving for flatness. However, the peaks seam to land in all the right places and the coloration is not objectionable for most music.
Member
Joined 2009
Paid Member
XRK,
What kind of stuffing density and positioning are you using in your simulations?
One should be able to iron out some of the more pronounced peaks and dips with well positioned stuffing.
What kind of stuffing density and positioning are you using in your simulations?
One should be able to iron out some of the more pronounced peaks and dips with well positioned stuffing.
The above sim is unstuffed. I agree that well placed stuffing can and does help. I have not optimized model to include this - this was from a while back before I implemented stuffing.
Having lived with my completed Cornus for a few days I'm beginning to suspect that I haven't got the stuffing quite right 🙁.
For the most part things sound good, but on some tracks that I know well you get the bass/rhythm and the vocals but the mids seem recessed and almost missing.
I assume I'll need to add more stuffing to the channels, as the driver chamber is already pretty densely stuffed, time to find an old wire coat hanger or something similar to help me push some stuffing further into the channels 🙄.
For the most part things sound good, but on some tracks that I know well you get the bass/rhythm and the vocals but the mids seem recessed and almost missing.
I assume I'll need to add more stuffing to the channels, as the driver chamber is already pretty densely stuffed, time to find an old wire coat hanger or something similar to help me push some stuffing further into the channels 🙄.
Blaides,
Yes, it takes a little trial and error (or a measurement mic) to get the stuffing right to balance the mids with the bass. Probably add some stuffing to first 3 or 4 inches of throat to channel before the split. Some success has also been achieved by adding stuffing loosely through the mouth.
Good luck!
X
Yes, it takes a little trial and error (or a measurement mic) to get the stuffing right to balance the mids with the bass. Probably add some stuffing to first 3 or 4 inches of throat to channel before the split. Some success has also been achieved by adding stuffing loosely through the mouth.
Good luck!
X
To be expected. The initial shine wears off: "Wow that's a lot of bass!" to "What happened to the vocals?"
Couldn't have said it better.
I have one speaker done yesterday but no time to hook it up yet, this weekend it looks like I will have time to finish the other one - however I will not have the patience to wait for the second one to be complete before signal is given the first one 
The build is by any standard fairly crude but it's main objective was to satisfy my curiousity with the Cornu design and the Vifa TC9 element 🙄
I put stuffing in just past to where the channel splits in two.
My intention for these is to use them in my gym at home where they will fit nicely up on the wall 🙂 Pics will follow...
The build is by any standard fairly crude but it's main objective was to satisfy my curiousity with the Cornu design and the Vifa TC9 element 🙄
I put stuffing in just past to where the channel splits in two.
My intention for these is to use them in my gym at home where they will fit nicely up on the wall 🙂 Pics will follow...
Great words Cal, same reason I dislike measurements. Plus I just don't want to lay out the cash, and If my ears like what I'm hearing that is all that matters. Is it what others hear? IDK, do I care? not really they don't have to live with the system. 🙂
Last edited: